Hence, two different neutron capture experiments were carried out at the CERN n_TOF facility [1]}. This installation and the conventional experimental set-up of two C\(_6\) D\(_6\)  detectors [2]} are described in Sec. REF . The C\(_6\) D\(_6\)  detectors represent the state-of-the-art in this field and thus they are systematically used as reference for comparison purposes along this work. The i-TED demonstrator is described in Sec.REF . The reconstruction of the \(\gamma \) -ray energy depositions and interaction points in i-TED were based on our previous works [3]}, [4]}, [5]} and for more details the reader is referred to those articles and references therein. Sec. REF  shows the performance of the imager in terms of energy and Compton imaging capability by the time of the experiment. The first PoC experiment is described in Sec. REF . Here, a simultaneous measurement of the \(^{197}\) Au(\(n,\gamma \) ) reaction both with C\(_6\) D\(_6\)  detectors and with i-TED was performed in order to demonstrate the suitability of i-TED for the neutron-TOF technique in a high-resolution facility. The second PoC experiment is described in Sec. REF  and consisted of a simultaneous measurement of the \(^{56}\) Fe(\(n,\gamma \) ) reaction with both C\(_6\) D\(_6\)  detectors and i-TED. The objective here was to demonstrate the background rejection capability of i-TED and to quantify the attainable enhancement in terms of signal-to-background ratio (SBR). This reaction was chosen because it shows an isolated resonance at \(E_\circ =1.15\)  keV, which is well suited to evaluate SBRs in the several \(\sim \) 10 keV of neutron energy, which is the range of interest for astrophysics.
